chore: update Helm chart version to 0.8.2 and adjust README badges

Signed-off-by: Noooste <83548733+Noooste@users.noreply.github.com>

release-please-config.json

@@ -2,26 +2,16 @@
   "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
   "bump-minor-pre-major": true,
   "bump-patch-for-minor-pre-major": false,
-  "separate-pull-requests": false,
   "packages": {
     ".": {
       "release-type": "go",
       "component": "garage-ui",
       "include-component-in-tag": false,
       "changelog-path": "CHANGELOG.md",
-      "exclude-paths": [
-        "helm/garage-ui",
-        ".github",
-        "docs",
-        "scripts"
+      "extra-files": [
+        "helm/garage-ui/Chart.yaml",
+        "helm/garage-ui/README.md"
       ]
-    },
-    "helm/garage-ui": {
-      "release-type": "helm",
-      "component": "garage-ui-chart",
-      "package-name": "garage-ui",
-      "include-component-in-tag": true,
-      "changelog-path": "CHANGELOG.md"
     }
   }
 }